Wifi issues and Q about flashing stock ROM

[moransw]

Hi, I bought a used Verizon Note Pro 12.2 SM-P905V and when I got it, noticed that the wifi is very flaky. Initially, it connected to my router fine but took 9 hours to load 120 apps when I signed in to Play using my normal Google account. So I did a factory reset, and then it wouldn't see my router at all. Restart router, factory reset device, no dice.

In the notification shade, wifi icon is always green as if it's on, but when I go into settings, the toggle is off. When I slide it to on, it turns gray and after a minute or so goes back to off. Multiple hard resets, still the same issue. Occasionally, it will "see" the routers, but this only lasts for a few seconds and then they are gone.

So I decided to flash the firmware. I did not complete another factory restore before I embarked on this, but had only just gone through the initial language screens and signed in on the tablet with a brand new Gmail account that had nothing on it. So I downloaded official 5.1.1 ROM from Sammobile, installed device drivers, installed Odin, (followed some great instructions found on XDA, thanks), got the tablet into download mode, connected to laptop and Odin on my laptop showed connection was live and it began to do it's thing. So I left it alone for 30 minutes and when I came back, Odin read "all done!" (or something similar) highlighted in green , and the tablet had restarted, so I assumed all is good.

However, I expected that the flash process would have wiped the setup I had begun on the tablet, but it did not. And the wifi issue still exists. Looks to me like nothing has changed. So two questions for you:
1) Does this mean that the flash did not happen correctly?
2) Do you have any suggestions on how I can fix this wifi issue? (LTE works fine but I don't want to eat up all that expensive data.)

Thanks for any help!

 

[Beut]

Wifi circuit has many components on mainboard and I believe it's beyond abilities of most users even professionals as you cannot find components and schematic to fix them.
Your best source is looking for this tablet with a broken LCD like this one:
http://www.ebay.com/itm/172145691764?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.com/itm/Samsung-Gal...069075?hash=item1a15927393:g:D8MAAOSwbYZXZKDb
If you don't have the need to LTE connection, Note Pro wifi mainboard SM-P900 also fit but you need rear camera for SM-P900 as rear camera of LTE won't work in Wif mainboard.

Any LTE Note Pro 12.2 like P907T( Tmobile) P907A ( AT&T ) mainboard will fit to P905V as they are exactly the same mainboard, except firmware, bootloader and software loaded into it.

I swapped a SM-P907A mainboard to a SM-P905V tablet, it works as an AT&T tablet because the software is for AT&T.

 

[efaustus9]

I purchased a verizon note pro 12.2 SM-P905V refurbished from groupon last October. For the last few months the wifi on the tablet has been very flaky. I have a number of devices and only this one frequently drops connection. I never upgraded from kitkat I and was hoping that this issue was software related. Seeing that moransw is experiencing the same problem with this same model but is trying to get back to sock kitkat gives me concern that a software update will not resolve the problem. The other problem I've been having lately is that the device no longer recognizes the stock charger, and will now only charge painfully slow. I've tried a different charge cable from a samsung s6 to no avail. Is the SM-P905V a lemon?

 

[Beut]

You should use this one to test your charger and usb cable
http://m.ebay.com/sch/i.html?_nkw=u....Xusb+voltage+current&sqp=usb+voltage+current
If you're using correct cable and charger, current should be 1.7 A and voltage should be 5.3 V
Test with known working cable and charger, if nothing is different you should consider to buy new usb flex charging port, around $10.
These basic steps you should do first as nobody can give exactly an answer with many unknowns. It happens to many used tablets, not just this model.
These basic troubleshootings are easy done for simple problem of bad cable, charger or USB port
Try them first then post your results if you need more help for further steps

 

[efaustus9]

However, I expected that the flash process would have wiped the setup I had begun on the tablet, but it did not. And the wifi issue still exists. Looks to me like nothing has changed. So two questions for you:
1) Does this mean that the flash did not happen correctly?
2) Do you have any suggestions on how I can fix this wifi issue? (LTE works fine but I don't want to eat up all that expensive data.)

Thanks for any help!

1) I am using stock kitkat rooted and I was experiencing the same issue

2) I found this thread regarding our tablet that seems to suggest a bug with wifi if you are using a Bluetooth device

http://forum.xda-developers.com/galaxy-note-pro-12/help/wifi-disconnects-bluetooth-device-t2851406

I was streaming audio through bluetooth to my home surround system, I disabled the bluetooth radio and I haven't had an issue with wifi since. I now use chromcast to stream audio through my surround sound.